Scraper



J. S. WALCH May 9, 1939.

SCRAPER s sheets-shed 1 Filed March 13, 1937 May 9, 1939 l J. s. wALcH 12,157,311-

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Patented May 9, 1939 s UNITED STATES PATENT OFFICE SCRAPER Jacob S.Walch, Springiield, lill., assignor to Baker Manufacturing Co.,Springeld, Ill., a corporation of Illinois Application March 13, 1937,Serial No. 130,655

14 Claims. (Cl. 37-133) This invention relates to wagon Scrapers Thescraper bowls of this invention, on the adapted to be connected to anddrawn by a prim other hand, are made long and narrow and have mover suchas a tractor. as great or even greater load capacity than the Morespecifically, this invention relates t two heretofore proposed widebowls. At the same Wheeled Scrapers having elongated dirt receivingtime, since the scraping blade is not widened, 5 bowls open `at bothends with the front ends the scraper can be operated without the addedcarrying a scraper blade and the rear ends traction power required onthe wide type adapted to be closed by a gravity operating gate.scrapers.

The scrapers of this invention include a rigid By having the rear endsof the bowls spaced 1.0 frame structure comprising side beams supportedconsiderably from the scraping edge, the matefrom the ground on wheelsand having downrial scraped into the bowls can be moved to the turnedend portions. A shaft is rigidly secured back end thereof by the tiltingoperation deat its ends to the bottoms of the downturned scribed above.This material will stay at the portions of the side beams and extendsbetween back end so that when the scraping operation is l5 the beams. Ascraping bowl is disposed between resumed, the new material entering thescraper 15 the side beams and has the bottom thereof pivdoes not have topush the previously received otally supported on the shaft. The scrapingmaterial backward into the bowl. This also bowl has a lengthconsiderably greater than its lessens the traction power required foroperation width so that the back ofthe bowl is spaced of the scraper.

2U considerably from the frontcutting edge carried A feature of thisinvention is the provision of 20 at the front of the bowl. V'An L-shapedgate is horizontally and/or vertically adjustable wheels pivotallymounted to the top of the bowl for closor crawler tracks on the framestructure of the ing the rear end theleOf and S Closed by its scraper toobtain a desired amount of clearance own Weight Whenever the bowl isdisposed in for the rear end of the bow1 such as is desired scraping 0I'load Carrying positions. However, when the load in the howl is dumpedover em- 25 When the bOWl iS tilted upwardly into dumping bankments andthe like or to raise the bowl from DOSOD, the gate Swings Open bygravity t0 perthe ground as when working in sandy or wet light mitdischarge of the'load from the bowl through S011,

the rear end thereof. If it is desired to maintain The scraper bowl ispreferably closed at the 3o the gate in closed position even when thebowl is top Vof the front end thereof by a plate rigidly 30 tilted`upwardly to a dumping position, latching afxed to the bowl. If desired,a front end gate means can be utilized to hold the gate against canoperate to close the open space beneath this the rear end of the bowl.plate during carrying and load dumping opera- I It is highly desirablein Scrapers of this type tions. The gate is adapted to rest on the frames.; to be able -to load the scraping bowl to capacity Structure duringscraping operations and means SO as to eliminate seLeral trips to thedumping can be provided cooperating with the gate strucground fortransporting loads which, due to the ture for regmating the depth of thecut to be capacity of the bowl, could be carried in one taken by thescraper blade. trip- It is then an object of this invention to pro- '4oThe provision of a long, narrow bowl, accordvide a wheeled scraperhaving a long, narrow 40 ing to this invention, makes possible a tiltingof scraping bowl. the bOWl tD tht0W the load into the bwk end A furtherobject of this invention is to provide thereof without moving thescraper from the a, dirt scraping and diri; carrying apparatus scrapingground. One or more of such tilting adapted to be drawn by a prime moversugh as 'a fi operations on the scraping ground insures a fillingtractor alnd operated entirely by uid pressure of the bowl to capacity,thereby eliminating sevmeans controllable from the tractor.

eral trips to the dumping ground. d

A further obJect of this invention is to provi e A serious drawback toall heretofore known a Wagon Scraper having the Wheels thereof a (1Scrapers is the diiiiculty in obtaining a pay l load into the bowl by ascraping action. Extra Justably mounted ahead 0f the dump end 0f the 50scraper. geg/ sgrgianyg hfaigvfe? :s515135 dbgvlrs A further object ofthis invention is to provide widened, the scraper blade is also widenedand a rear end gate for two-wheeled wagOl Scrapers takes awider cut.This requires additional traowhich is pivoted to the scraper bowl and,be-

tion power to pull the scraper. cause of the position of the pivot,remains closed 55 by gravity until the bowl is tilted to dumpingposition.

Another object of this invention is to provide a two-wheeled wagonscraper having an elongated scraping bowl adapted to carry increasedquantities of material Without widening the scraping edge, and therebymaking possible an operation of the scraper with a minimum amount oftraction power.

Another object of this invention is to provide a scraper having fluidpressure means for lowering the scraper bowl into scraping position, fortilting the bowl to throw material received in the bowl to the back endthereof, and for dumping the material from the bowl.

Another object of this invention is to provide a gravity operated rearend gate for scraper bowls that does not need to be locked during thescraping and load carrying operations of the scraper.

A further object of this invention is to provide a simple, rear end gatelatching means for maintaining the gate in a closed position when it isdesired to tilt the scraper bowl for throwing the load therein to therear end of the bowl without dumping the load.

A further object of this invention is to provide an L-shaped gate forthe rear end of wagon scraper bowls that is pivoted to the bowl at thetop thereof in spaced relation from the rear end.

Other and further objects of this invention will become apparent tothose skilled in the art from the following detailed description of theannexed sheets of drawings which disclose a preferred embodiment of theinvention.

On the drawings:

Figure 1 is a side elevational view of a wagon scraper according to thisinvention, with a part of the tongue broken away. and showing, in fulllines, the position of the scraper bowl and rear end gate therefor inscraping position and showing, in dotted lines, the position of thescraper bowl and the locked position of the rear end gate therefor whentilted to throw material received in the bowl into the back end thereofas well as the open position of the gate for dumping.

Figure 2 is a top plan view` of the scraper shown in Figure 1.

Figure 3 is a fragmentary bottom plan View taken along the line III-IIIof Figure 1.

Figure 4 is a vertical cross-sectional view taken along the line IV-IVof Figure 3.

Figure 5 is a fragmentary front view of the front end gate support.

Figure 6 is a vertical cross-sectional view, with parts shown inelevation, taken substantially along the line VI-VI of Figure l.

Figure '7 is a fragmentary cross-sectional view, with parts shown inelevation, taken along the line VII-VII of Figure 6.

Figure 8 is a vertical cross-sectional view, taken substantially alongthe line VIII- VIII of Figure 2 but with the side plate of the scraperbowl broken away.

Figure 9 is a vertical cross-sectional view, taken substantially alongthe line IX-IX of Figure 1.

As shown on the drawings:

In Figures 1 and 2, the reference numeral IIJ designates generally theframe structure for the scraper. of side beams II and I2 in spacedparallel relation rigidly connected at their front ends to a cross beamor yoke I3. 'I'he side beams II and I2 are turned down at their rearends as shown at I4 in Figure 1. A shaft I5, best shown in Fig- Thisframe structure comprises a pair' ure 3, is rigidly secured at its endsin the bottoms of the turned down portions I4 of the beams II and I2.The shaft I5 extends between the beams as shown in Figure 3.

The cross beam or yoke member I3, as best shown in Figure 2, has atongue member I6 bolted to the center thereof by means of bolts IBa. Thefront end of the tongue I6 is provided with a coupler for joining thetongue with a prime mover such as a tractor. Wheels I1 and I8 supportthe frame structure I0 from the ground. If desired, tracks of thecrawler type can be used in place of wheels. v

As best shown in Figures 6 and 7, the wheels are freely rotatable onanti-friction bearings such as I9 and 20 disposed around an axle 2|extending into the hub 22 of the wheel I1. The axle 2| has an integralportion 23 thereof extending from the hub 22 of the wheel toward theside beam I I. This portion 23 is integral with a vertical plate 24 ofgreater width than the side beam II. The plate 24 has two or more rowsof bolt receiving holes along the top and two or more rows of said holesalong the bottom thereof. Webs or fins 25, integral with the plate 24and the portion 23 of the axle, support and rigidify the axle structurewith the plate 24. A web or fin 26 can also extend from the top of theplate 24 along the axle portion 23, integral with the plate and axle.

A seal S is disposed in the end of the hub 22 of the wheel I1 to preventingress of dirt and loss of lubricant from the hub.

A plurality of bosses 21 are welded to the top of the side beam IIbetween the downturned portion I4 thereof and the iront end thereof. Aplurality of bosses 28 are likewise welded to the bottom of the sidebeam I I underneath the bosses 21. A plate 29 having a plurality ofopenings therethrough in alignment with the openings through the bosses21 and 28 is welded to the frame I I and to the bosses to form a rigidstructure integral with the side beam.

As shown in Figures 6 and '7, the plate 24 is placed against the plate29 so that the top row of holes and the row of holes above the bottomrow therein are aligned with the holes in the plates 24. Bolts 30 areinserted through the holes in the plates 24 and 29 and through thebosses 21 and 28. Nuts 3| secure the bolts in position and rigidly holdthe axle structure on the beam. Since the portion 23 of the axle may bedisposed in front of one of the bosses 21 thereby preventing theinsertion of a bolt such as 30, the end of the axle portion 23 may betapped and threaded as at 32 (Figure 6) for receiving in threadedengagement therewith a bolt 33 inserted from the beam side of thestructure.

This axle mounting structure permits a positioning of the axle at anydesired point along a side beam of the frame structure. It should beunderstood that the axle structure is duplicated on the side beam I2.'I'hus when it is desired to move the wheels I1 and I8 toward the frontend of the frame or toward the rear end of the frame, the bolts 30 and33 may be disengaged and the plates 24 of the axle structures placed inalignment with a new set of bolt receiving bosses on the side beams.'I'he wheels can thus be adjusted longitudinally along the side beams IIand I2 to any position desired.

If it is desired to mount the side beams closer to the ground, the plate24 is merely aligned on the plate 29 so that the bottom row of holes andthe second row of holes therein register with the holes in plate 24. Ifa higher mounting than that bili shown in Figures 8 and 7 is desired theplate 24 may be rotated to place the bottom rows of holes at the topthereof. Since the axle portion 23 is off-center on the plate 24, beingshown as closer to the top of the plate, this rotation of the platelowers the axle and this raises the beams.

A scraper bowl 35 is mounted between the side beams II and I2 back ofthe cross beam I3. The bowl 35 comprises side plates 36 and 31, a bottomplate 38 and a front plate 39 secured to the front ends of the sideplates 36 and 31 but spaced from .the bottom plate 38.

As best shown in Figures 3 and 4, the bottom plate 38 is swivellymounted on the shaft I5 of the frame structure by means of split bearingstraps 39, 48 and 4I. A reinforcing beam 42 is disposed between thebearing straps and the bottom 38 of the bowl. Bolts 43 extend throughthe bottom plate 38, the reinforcing member 42 and the strap members torigidly connect the straps to the bowl and to hold the straps around theshaft I5.

Collars 44 and 45 or other abutment members are rigidly or integrallysecured to the shaft I5 adjacent the bearings 39 and 4I on the innersides of these bearings for holding the straps against longitudinalmovement on the shaft I5. The bowl is thus disposed and held in spacedrelation from the beams II and I2.

Rigidifying members 46 and 41 can be welded to the side plates 36 and 31for resisting torsional strains to which the bowl 35 may be subjected.

As best shown in Figure 1, the side plates of the bowl 35 have their topedges sloping downwardly at the rear end of .the bowl as shown at 58.The sloping portion 58 of the side plates is rounded as at 5I and therounded portion 5I symmetrically curves into the rear end orsubstantially vertical portion 52 of the plates.

The front ends of the plates 36 and 31 are cut back at the bottomthereof as at 53 (Figure l). The bottom 38 of the bowl extends only upto this cut baci: portion 53, and extends straight back.n

from this portion to a point intermediate the ends of the bowl where itis bent upwardly to form a sloping portion 54 extending to the rearportion 32 of the side plates 33 and 3l.

As shown in Figure 8 a reinforcing channel beam 33 may be mounted underthe bottom plate lll near the iront end-thereof.

As shown in Figures 8 and 9 the very front end of the bottom plate 38 isbent downwardly as at 33 (Figure 8) to form a bed for the scraper blade3l which is bolted to the bottom of the scraper bowl. A reinforcingplate lit is mounted under the bottom 38 and extends from thereinforcing beam 33 to the front end portion 36 of the bottom plate.This reinforcing plate has turned up side portions 59 rigidly secured tothe side plates 35 and 31 of the bowl. Ribs 68 are disposed between theplate 58 and the bottom 38 of the bowl and may be welded into position.These ribs maintain the proper space between the bottom 38 and the plate58 and rigidify the mounting for the blade 51. o1' the scraper blade 51are flush with the outer face of the upturned portion 59 of thereinforcing plate 58 so that the scraper blade extends through theopening provided by the cut back portion 53 of the side plates 36 and31. The upturned portions 59 of the reinforcing plate 58 have similarout back portions.

As lshown in Figure l, the upturned portions 59 of the reinforcing plate58 can be welded to the stiffener or reinforcing member 41.

- 31 respectively of the bowl.

As shown inv Figure 9 the ends This construction provides a, rigid bedfor the scraper blade.

It has been pointed out above that the front plate 39 secured on thescraper bowl 35 is spaced from the bottom of the bowl. There is thus anopen space at the front end of the bowl between the bottom of the frontend plate 39 and the scraper blade 51. During load carrying positions ofthe bowl it is desirable to close this space for preventing loss ofmaterial therethrough. For this purpose a front end gate 6I may beprovided. This gate is mounted in front of the scraper bowl and extendsthe full width of the bowl. The gate 6I has rearwardly extending arms 62and 63 pivoted to the side plates 36 and The gate 6I carries a shoe 64at the center thereof adapted to rest on the cross beam I 3 of the framestructure (Fig. 5). This shoe 64 can be provided with vertical boltreceiving slots 65 and 66 for receiving bolts 61 therethrough extendingthrough the gate at the mid-portion thereof to secure the shoe to thegate. The vertical slots 65 and 66 permit vertical adjustment of theshoe on the gate.

As ,best shown in Figure 1, when the bowl 35 is in scraping position theshoe 64 rests on the cross beam I3 of the frame I8 to hold the gate inspaced relation from the blade 51. The amount of opening between thescraper blade and the bottom of the gate 6I during scraping operationcanbe adjusted by vertical adjustment of the shoe 64. However, when thebowl 35 is raised to carrying position, the gate does not move upwardlywith the bowl until the scraper blade 51 contacts the bottom of thegate. In this position of the bowl, therefore, the gate effectivelycloses the front end of the bowl and prevents loss of material duringcarrying position. As shown in dotted lines in Figure 1 the bottom ofthe gate 6I rests on the scraper blade 51 when the bowl is in tiltedposition, such as for dumping, or for throwing the load into the backend of the bowl.

The side plates 36 and 31 of `the bowl 3 5 may carry brackets 68supporting adjusting screws b9 for abutting stops 69a, on the arms 32and 63 of the gate member lill The depth of out taken by the scraperblade 51 can thus be nicely adjusted by the adjusting screws 69 sincethe shoe 3d of the gate bl rests on the frame and the arms 8l and 33 ofthe gate cannot" move any lower than the shoe 8d will permit. Thus thefront end oi the bowl can only be lowered until the adjusting screws t9contact the stops 33a on the arms of the gate. It should be understood,however, that other types of stops or adjusting means can be used forregulating the depth of out to be talren by the scraper blade 3l.

Fluid pressure operated jacks 18 and 'll have the cylinders thereofpivoted to brackets 12 and 13 secured on the frame I8 near the front endthereof. The piston rods 14 and 15 of the jacks are pivoted to the sidesof the scraper bo`w1-35 preferably on a reinforcing member 46 or 41thereof at points intermediate the ends of the bowl.

As best shown in'Figure 2, a fluid pressure line 16 extending from theprime mover for the scraper is connected through branch tubes I1 and 18with the front ends of the cylinders 18 and 1I respectively. A secondfluid pressure line 19 is 70 connected through branch tubes 88 and 8lwith the rear` ends of the cylinders 18 and 1I. Thus a valve can beconveniently located adjacent the driver's seat on the prime mover forthe scraper to control the operation of the hydraulic jacks i forraising and lowering the scraper bowl. Since the fluid on each side ofthe piston in either jack is in communication with the same side of thepiston in the other jack, both sides of the scraper 'bowl are acted uponby the piston rods 14 and 15 with an equal amount of force and the jacksare simultaneously operated. The intercommunicating relationship of thejacks thus prevents a cooking or buckling of one side of the scraperbowl relative to the other side due to uneven forces applied to thesides.

A shaft or tube 90 is rigidly Secured to the side plates 36 and 31 ofthe scraper bowl on the inside thereof, as best shown in Figure 2, atpoints adjacent the sloping portion 50 of the plates at the top of thebowl. The shaft 9-0 carries a plurality of hinges 9| for hingedlyconnecting the horizontal leg 92 of a rear end gate 93 for the bowl. Thegate 93 is L-shaped and has a vertical leg 94 disposed over the rear endof the bowl. The horizontal leg 92 thereof is disposed over the top ofthe bowl. The edges of the gate 93 rest on the edges of the portions 50,5| and 52 of the side plates 36 and 31,

Because of the forward position of the hinges 9| with respect to thevertical leg 94 of the gate 93, and with respect to the pivotal axis ofthe bowl 35 the gate remains closed by gravity during scraping andcarrying positions of the bowl. Thus no latching means are needed formaintaining the gate in closed position during scraping and loadcarrying operations of the scraper. However, when it is desired to throwthe load into the rear end of the bowl without dumping the load from thebowl, latching means must be provided to hold the gate in closedposition. For this purbose, a rod 95 is rotatably mounted across theoutside of the gate 93 and has the ends thereof 'projecting beyond thesides of the gate for rebeiving latches 96 thereon. The latches 9S havehooks 91 adapted to engage lugs 98 carried by strap members 99 securedto the side plates of the bowl. A boss member is secured on the rod 95at the center thereof and is provided with an arm |0| for receiving aspring |02 carried by the gate. A stop member |03 is also formed on theboss |00 and adapted to contact the gate 93 for arresting the rotationof the rod 95 caused by the spring |02. The spring |02 thus holds thelatches 96 secured on the ends of the rod 95 out of engagement with thelugs 98.

The side plate 36 of the scraper bowl 35 has 'pivoted thereon, adjacentthe latches 96, a` link arm |04 provided with a bifurcated end |05carrying between the furcations thereof a roller |06 adapted to ride onthe latch 96.

A cable |01 is connected to the forward end of the arm |04, trainedunder a pulley |08 secured at the rear end of the side beam I| andthreaded 60 through eyes |09 carried on the side beam to the primernoverfor the scraper. When the operator 'desires to latch the rear end gate93 of the scraper, the cable |01 is pulled to move the arm |04downwardly against the stop member ||0 formed on the side plate 36. Thedownward movement of this end of the link arm |04 moves the bifurbatedend thereof toward the lug 98 and the roller |06 carried in thebifurcated end urges the latch 96 against the pressure of the spring |02so that its hook 91 engages the lug 98. Since the latch 96 on the otherend of the rod 95 is moved by a rotation of the rod it also has the hook91 thereof engage itslug 96 on the plate 31 of the scraper bowl. Thecable |01 can be tied to hold the latches into locked position and thescraper bowl may be tilted as shown in dotted lines in Figure 1 bymanipulation of the hydraulic jacks for throwing the load in the scraperbowl to the rear end of the bowl. Since the gate coversl the top of thebowl at the rear end as well as the back of the bowl, the load can bethrown back by this tilting operation to completely fill the rear end ofthe bowl. I

When scraping operations are to be resumed, the bowl is tilted back intoscraping position shown in solid lines in Figure 1 and the cable may bereleased to permit an unlatching of the end gate locks. When the bowl isthen filled with material scraped therein it can be raised to a carryingposition so that the front end thereof is spaced from the ground and thematerial in the bowl can be transported to the dumping ground Withoutlatching the rear end gate since the same will remain closed. When thebowl is then tilted to dumping position the gate will swing open bygravity as shown in Figure 1 and permit a discharge of the loadtherefrom through the rear end thereof. Since the horizontal leg of thegate moves away from the top of the bowl during the dumping operationthe material in the bowl can fall freely therefrom.

The gate itself can be used as a leveling means for the dumped materialby connecting the gate to the bowl with a chain or other holding means,so that the gate will drag behind the scraper in its opened position.The chain l l can be secured to a side plate of the bowl on a pin orbolt |I-2 disposed in any one of a number of spaced holes ||3 in theside plate. In this manner the amount which the gate is permitted toopen can be regulated.

From the above descriptions lit should be understood that this inventionprovides a greatly improved wheeled scraper construction capable ofbeing operated entirely from the drivers seat on the prime mover for thescraper. Fluid pressure operated means controlled from the prime movercan be utilized to lower the scraping bowl to scraping position, toraise the bowl to a carrying position, to tilt the bowl beyond thecarrying position for throwing material/ into the back end of the bowland for dumping the material out of the back end of the bowl.

I am aware that many changes may be made and numerous details ofconstruction may be varied through a wide range without departing fromthe principles of this invention, and I, therefore, do not purposelimiting the patent granted hereon otherwise than necessitated by theprior art.

I claim as my invention:

1. In a wagon scraper, a main frame including spaced side beams, a bowlpivotally mounted on the frame between the side beams, means for tiltingthe bowl relative to the frame for dumping material collected thereinout of the rear end of the bowl, wheels supporting the side beams fromthe ground at points forward of the rear end of the bowl, and means forselectively positioning said wheels along the side beams to vary thedegree of projection of the rear end of the bowl beyond the wheels toaccommodate variable dumping conditions out of the rear end of the bowl.

2. In a wagon scraper having rigid spaced opposed side frame beams and abowl pivotally 4mounted between said side frame beams for verticalmovement at its forward end, axles secured of the bowl, wheels rotatablymounted on said axles for supporting the side frame beams from theground and means for selectivelypositioning said axles along the lengthof said side frame beams to vary the degree of projection of the rearend of the bowl beyond the axles.

3. A wagonA scraper including a rigid frame structure pivotallysupporting a scraper bowl, axle structures bolted to said framestructure, wheels rotatably mounted on said axle struc-v tures forcarrying the frame structure in spaced relation from the ground, aplurality of bolt receiving means on said frame structure and boltreceiving means on said axle structuxes whereby said axle structurescanbe bolted at diierent posltions on the frame to vary the 'distance ofthe wheels` from the rear end of the frame and to vary the distance ofthe frame from the ground.

4. A scraper including a frame supported from the ground, a scooppivoted on the frame for tilting movement relative thereto at itsforward end, said scoop being open at its rear end, iluid pressure meansfor tilting the scoop relative to the frame, an end gate closing therear end of the scoop during scraping and carrying positions of thescoop, said rear end gatebeing pivoted relative to the scoop at a pointahead of the pivotal axis of the scoop, a latch for locking the gate inclosed position, spring means normally holding the latch in unlockedposition, cable operated means cooperating with fsaid latch for actingagainst the spring means to lock the latch whereby a tilting of thescoop from carrying to dumping position moves the pivotal axis of thegate back of the bowl pivot point whereby the vgate will open by gravityfor discharging Ya load out of the rear end of the scoop unless thecable operated means are actuated to lock the latch whereupon the loadin thescoop will be moved toward the rear end of the scoop, withoutbeing discharged therefrom.

5. A wagon scraper comprising spaced opposed side frame members, a crossmember connecting the front ends of the side frame members, a tonguemember detachably secured to said cross member at the mid-portion of themember, said side frame members having downturned end portions, a shaftextending between the side frame members having the ends thereof rigidlysecured. to said downturned portions, a scraper bowl having the rear endportion mounted on top of said shaft, bearing members pivotallyconnecting the bowl around the shaft, a plurality of longitudinallyspaced wheel support receiving means on said side frame membersintermediate the ends thereof, and wheels carried by said supportreceiving means whereby said wheels can carry the frame from the groundand canv be mounted at selected distances from the rear end of the bowl.

6. In combination, a frame structure having` spaced opposed side beams,bolt receiving bossesA secured to said side beams, plates having a plu-`rality of bolt holes therethrough for alignment with said bosses, boltsextending through said bosses and through the bolt holes in said platesfor rigidly joining the side beams and plates, stub-axles integrallyunited to said plates and extending outwardly therefrom and means4integral with said plates and with said stub-axles for rigidiiying theaxles with the plates, whereby said axles can be disposed at selectedpositions along the length of said side beams.

7. A Wagon scraper comprising a main trame having 'spaced opposed sidebeams. a bowl disposed between said side beams and pivoted thereonadjacent its bottom rear end, said bowl being open at the front and rearends thereof, a plate disposed between the side walls of the bowl at thefront end thereof in spaced relation from the bottom of the bowl forpartially closing the front end of the bowl, a scraper blade carried atthe Lfront bottom end of the bowl, a front end gate disposed in front ofthe front plate of the bowl, arms extending rearwardly from said gatepivoted to the side walls of the bowl, a shoe carried by said gate forresting on said frame to hold the gate in spaced relation from thescraper b.ade when the bowl is in digging position, and means' fortilting the bowl about its pivotal axis whereupon the scraper blade willbe raised toward the bottom of the gate to close the space at the frontend of the bowl beneath the front end plate of the bowl.

8. In a wheeled scraper, a frame structure, a scoop pivotallyA carriedby said frame structure for movement in a vertical plane relativethereto, a iront end gate for said scoop pivoted to the scoop, meansadapted to thrust against the frame structure for supporting the gate inspacedrelation from the ground and adjustable stops on said scoop forcooperation with the gate to control the distance which the front end ofthe scoop may be lowered.

9. A scraper comprising a frame structure having side frame beams, abowl pivoted on said frame structure between the side frame beams v formovement at its forward end, means for supporting said trame structurefrom. the ground, axles rotatably carrying said means, plates secured tosaid axles having a plurality of horlzontal rows of holes therein, saidside frame beams having a plurality of bolt receiving means thereon, andbolts for connecting the plates with the side frame beams whereby saidplates can be adjusted vertically on the beams by selection of therows-of holes .therein for the bolts and said side frame beams can beadjustably spaced from the ground.

10. In a scraper, side frame beams, means for supporting the beams fromthe ground, axles rotatably carrying said means, plates secured to saidaxles having bolt holes therein, said axles being off-center on saidplates, bolt receiving means on said side beams and bolts for securingthe plates to the beams whereby a rotation of the plates will adjust thevertical positions oi' the axles to raise or lower the beams.

ll. A wagon scraper comprising a frame structure' including spaced sideframe beams, a scraper bowl mounted between said side frame beams formovement in a vertical plane relative thereto, a front end gate forattachment to the scraper bowl, arms extending rearwardly from the gate,-means pivotally connecting the arms with the bowl, means carried by thegate adapted to rest against the frame structure for holding the gateabove the bottom of the bowl when the bowl is lowered to scrapingposition, Vand adjustable stops on said bowl for'cooperation with thearms of the gate to control the distance which the iront end of the bowlmay be lowered beneath the bottom of the gate. .i

12. A wheeled scraper including a frame structure having spaced opposedside frame beams, a scraper bowl mounted between said side frame beamsand carried by saidv frame for vertical movement at its forward end,axle structures adapted to be secured to said side frame beams, wheelsrotatablymounted on said axle structures for carrying the framestructure in spaced relation from the ground, a plurality of axlestructure mounting means along the length of said side frame beams andmeans securing the axle structures to the side frame beams whereby saidwheels can be mounted at diierent positions along the frame to vary thedistance of the wheels from the rear end of the frame.

13. A wheeled scraper comprising a frame structure having side framebeam members, al

structure for supporting the side frame beam members from the ground andadditional bolt receiving means in one of said members spaced verticallyfrom the rst mentioned bolt receiving means to effect verticaladjustment of said side frame beam members from the ground.

14. In a wagon scraper, a frame structure, a bowl pivotally carried bysaid frame structure', a front end gate for said bowl pivoted to thebowl, an adjustable device adapted to thrust against the framestructure-for supporting the gate in spaced relation from the ground andan adjustable' stop operatively functioning between the gate' and bowlto control the distance that the front end of the bowl may be lowered.

^ JACOB S. WALCH.

